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fix an example of scatterlists handling in DMA-API.txt
[linux-2.6/mini2440.git] / drivers / video / tgafb.c
blob680642c089c9202b64f57f103e264b5ebc035609
1 /*
2 * linux/drivers/video/tgafb.c -- DEC 21030 TGA frame buffer device
3 *
4 * Copyright (C) 1995 Jay Estabrook
5 * Copyright (C) 1997 Geert Uytterhoeven
6 * Copyright (C) 1999,2000 Martin Lucina, Tom Zerucha
7 * Copyright (C) 2002 Richard Henderson
8 * Copyright (C) 2006, 2007 Maciej W. Rozycki
9 *
10 * This file is subject to the terms and conditions of the GNU General Public
11 * License. See the file COPYING in the main directory of this archive for
12 * more details.
13 */
14
15 #include <linux/bitrev.h>
16 #include <linux/compiler.h>
17 #include <linux/delay.h>
18 #include <linux/device.h>
19 #include <linux/errno.h>
20 #include <linux/fb.h>
21 #include <linux/init.h>
22 #include <linux/ioport.h>
23 #include <linux/kernel.h>
24 #include <linux/mm.h>
25 #include <linux/module.h>
26 #include <linux/pci.h>
27 #include <linux/selection.h>
28 #include <linux/slab.h>
29 #include <linux/string.h>
30 #include <linux/tc.h>
31
32 #include <asm/io.h>
33
34 #include <video/tgafb.h>
35
36 #ifdef CONFIG_PCI
37 #define TGA_BUS_PCI(dev) (dev->bus == &pci_bus_type)
38 #else
39 #define TGA_BUS_PCI(dev) 0
40 #endif
41
42 #ifdef CONFIG_TC
43 #define TGA_BUS_TC(dev) (dev->bus == &tc_bus_type)
44 #else
45 #define TGA_BUS_TC(dev) 0
46 #endif
47
48 /*
49 * Local functions.
50 */
51
52 static int tgafb_check_var(struct fb_var_screeninfo *, struct fb_info *);
53 static int tgafb_set_par(struct fb_info *);
54 static void tgafb_set_pll(struct tga_par *, int);
55 static int tgafb_setcolreg(unsigned, unsigned, unsigned, unsigned,
56 unsigned, struct fb_info *);
57 static int tgafb_blank(int, struct fb_info *);
58 static void tgafb_init_fix(struct fb_info *);
59
60 static void tgafb_imageblit(struct fb_info *, const struct fb_image *);
61 static void tgafb_fillrect(struct fb_info *, const struct fb_fillrect *);
62 static void tgafb_copyarea(struct fb_info *, const struct fb_copyarea *);
63 static int tgafb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info);
64
65 static int __devinit tgafb_register(struct device *dev);
66 static void __devexit tgafb_unregister(struct device *dev);
67
68 static const char *mode_option;
69 static const char *mode_option_pci = "640x480@60";
70 static const char *mode_option_tc = "1280x1024@72";
71
72
73 static struct pci_driver tgafb_pci_driver;
74 static struct tc_driver tgafb_tc_driver;
75
76 /*
77 * Frame buffer operations
78 */
79
80 static struct fb_ops tgafb_ops = {
81 .owner = THIS_MODULE,
82 .fb_check_var = tgafb_check_var,
83 .fb_set_par = tgafb_set_par,
84 .fb_setcolreg = tgafb_setcolreg,
85 .fb_blank = tgafb_blank,
86 .fb_pan_display = tgafb_pan_display,
87 .fb_fillrect = tgafb_fillrect,
88 .fb_copyarea = tgafb_copyarea,
89 .fb_imageblit = tgafb_imageblit,
90 };
91
92
93 #ifdef CONFIG_PCI
94 /*
95 * PCI registration operations
96 */
97 static int __devinit tgafb_pci_register(struct pci_dev *,
98 const struct pci_device_id *);
99 static void __devexit tgafb_pci_unregister(struct pci_dev *);
100
101 static struct pci_device_id const tgafb_pci_table[] = {
102 { PCI_DEVICE(PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_TGA) },
103 { }
104 };
105 MODULE_DEVICE_TABLE(pci, tgafb_pci_table);
106
107 static struct pci_driver tgafb_pci_driver = {
108 .name = "tgafb",
109 .id_table = tgafb_pci_table,
110 .probe = tgafb_pci_register,
111 .remove = __devexit_p(tgafb_pci_unregister),
112 };
113
114 static int __devinit
115 tgafb_pci_register(struct pci_dev *pdev, const struct pci_device_id *ent)
116 {
117 return tgafb_register(&pdev->dev);
118 }
119
120 static void __devexit
121 tgafb_pci_unregister(struct pci_dev *pdev)
122 {
123 tgafb_unregister(&pdev->dev);
124 }
125 #endif /* CONFIG_PCI */
126
127 #ifdef CONFIG_TC
128 /*
129 * TC registration operations
130 */
131 static int __devinit tgafb_tc_register(struct device *);
132 static int __devexit tgafb_tc_unregister(struct device *);
133
134 static struct tc_device_id const tgafb_tc_table[] = {
135 { "DEC ", "PMAGD-AA" },
136 { "DEC ", "PMAGD " },
137 { }
138 };
139 MODULE_DEVICE_TABLE(tc, tgafb_tc_table);
140
141 static struct tc_driver tgafb_tc_driver = {
142 .id_table = tgafb_tc_table,
143 .driver = {
144 .name = "tgafb",
145 .bus = &tc_bus_type,
146 .probe = tgafb_tc_register,
147 .remove = __devexit_p(tgafb_tc_unregister),
148 },
149 };
150
151 static int __devinit
152 tgafb_tc_register(struct device *dev)
153 {
154 int status = tgafb_register(dev);
155 if (!status)
156 get_device(dev);
157 return status;
158 }
159
160 static int __devexit
161 tgafb_tc_unregister(struct device *dev)
162 {
163 put_device(dev);
164 tgafb_unregister(dev);
165 return 0;
166 }
167 #endif /* CONFIG_TC */
168
169
170 /**
171 * tgafb_check_var - Optional function. Validates a var passed in.
172 * @var: frame buffer variable screen structure
173 * @info: frame buffer structure that represents a single frame buffer
174 */
175 static int
176 tgafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
177 {
178 struct tga_par *par = (struct tga_par *)info->par;
179
180 if (par->tga_type == TGA_TYPE_8PLANE) {
181 if (var->bits_per_pixel != 8)
182 return -EINVAL;
183 } else {
184 if (var->bits_per_pixel != 32)
185 return -EINVAL;
186 }
187 var->red.length = var->green.length = var->blue.length = 8;
188 if (var->bits_per_pixel == 32) {
189 var->red.offset = 16;
190 var->green.offset = 8;
191 var->blue.offset = 0;
192 }
193
194 if (var->xres_virtual != var->xres || var->yres_virtual != var->yres)
195 return -EINVAL;
196 if (var->nonstd)
197 return -EINVAL;
198 if (1000000000 / var->pixclock > TGA_PLL_MAX_FREQ)
199 return -EINVAL;
200 if ((var->vmode & FB_VMODE_MASK) != FB_VMODE_NONINTERLACED)
201 return -EINVAL;
202
203 /* Some of the acceleration routines assume the line width is
204 a multiple of 64 bytes. */
205 if (var->xres * (par->tga_type == TGA_TYPE_8PLANE ? 1 : 4) % 64)
206 return -EINVAL;
207
208 return 0;
209 }
210
211 /**
212 * tgafb_set_par - Optional function. Alters the hardware state.
213 * @info: frame buffer structure that represents a single frame buffer
214 */
215 static int
216 tgafb_set_par(struct fb_info *info)
217 {
218 static unsigned int const deep_presets[4] = {
219 0x00004000,
220 0x0000440d,
221 0xffffffff,
222 0x0000441d
223 };
224 static unsigned int const rasterop_presets[4] = {
225 0x00000003,
226 0x00000303,
227 0xffffffff,
228 0x00000303
229 };
230 static unsigned int const mode_presets[4] = {
231 0x00000000,
232 0x00000300,
233 0xffffffff,
234 0x00000300
235 };
236 static unsigned int const base_addr_presets[4] = {
237 0x00000000,
238 0x00000001,
239 0xffffffff,
240 0x00000001
241 };
242
243 struct tga_par *par = (struct tga_par *) info->par;
244 int tga_bus_pci = TGA_BUS_PCI(par->dev);
245 int tga_bus_tc = TGA_BUS_TC(par->dev);
246 u32 htimings, vtimings, pll_freq;
247 u8 tga_type;
248 int i;
249
250 /* Encode video timings. */
251 htimings = (((info->var.xres/4) & TGA_HORIZ_ACT_LSB)
252 | (((info->var.xres/4) & 0x600 << 19) & TGA_HORIZ_ACT_MSB));
253 vtimings = (info->var.yres & TGA_VERT_ACTIVE);
254 htimings |= ((info->var.right_margin/4) << 9) & TGA_HORIZ_FP;
255 vtimings |= (info->var.lower_margin << 11) & TGA_VERT_FP;
256 htimings |= ((info->var.hsync_len/4) << 14) & TGA_HORIZ_SYNC;
257 vtimings |= (info->var.vsync_len << 16) & TGA_VERT_SYNC;
258 htimings |= ((info->var.left_margin/4) << 21) & TGA_HORIZ_BP;
259 vtimings |= (info->var.upper_margin << 22) & TGA_VERT_BP;
260
261 if (info->var.sync & FB_SYNC_HOR_HIGH_ACT)
262 htimings |= TGA_HORIZ_POLARITY;
263 if (info->var.sync & FB_SYNC_VERT_HIGH_ACT)
264 vtimings |= TGA_VERT_POLARITY;
265
266 par->htimings = htimings;
267 par->vtimings = vtimings;
268
269 par->sync_on_green = !!(info->var.sync & FB_SYNC_ON_GREEN);
270
271 /* Store other useful values in par. */
272 par->xres = info->var.xres;
273 par->yres = info->var.yres;
274 par->pll_freq = pll_freq = 1000000000 / info->var.pixclock;
275 par->bits_per_pixel = info->var.bits_per_pixel;
276
277 tga_type = par->tga_type;
278
279 /* First, disable video. */
280 TGA_WRITE_REG(par, TGA_VALID_VIDEO | TGA_VALID_BLANK, TGA_VALID_REG);
281
282 /* Write the DEEP register. */
283 while (TGA_READ_REG(par, TGA_CMD_STAT_REG) & 1) /* wait for not busy */
284 continue;
285 mb();
286 TGA_WRITE_REG(par, deep_presets[tga_type] |
287 (par->sync_on_green ? 0x0 : 0x00010000),
288 TGA_DEEP_REG);
289 while (TGA_READ_REG(par, TGA_CMD_STAT_REG) & 1) /* wait for not busy */
290 continue;
291 mb();
292
293 /* Write some more registers. */
294 TGA_WRITE_REG(par, rasterop_presets[tga_type], TGA_RASTEROP_REG);
295 TGA_WRITE_REG(par, mode_presets[tga_type], TGA_MODE_REG);
296 TGA_WRITE_REG(par, base_addr_presets[tga_type], TGA_BASE_ADDR_REG);
297
298 /* Calculate & write the PLL. */
299 tgafb_set_pll(par, pll_freq);
300
301 /* Write some more registers. */
302 TGA_WRITE_REG(par, 0xffffffff, TGA_PLANEMASK_REG);
303 TGA_WRITE_REG(par, 0xffffffff, TGA_PIXELMASK_REG);
304
305 /* Init video timing regs. */
306 TGA_WRITE_REG(par, htimings, TGA_HORIZ_REG);
307 TGA_WRITE_REG(par, vtimings, TGA_VERT_REG);
308
309 /* Initalise RAMDAC. */
310 if (tga_type == TGA_TYPE_8PLANE && tga_bus_pci) {
311
312 /* Init BT485 RAMDAC registers. */
313 BT485_WRITE(par, 0xa2 | (par->sync_on_green ? 0x8 : 0x0),
314 BT485_CMD_0);
315 BT485_WRITE(par, 0x01, BT485_ADDR_PAL_WRITE);
316 BT485_WRITE(par, 0x14, BT485_CMD_3); /* cursor 64x64 */
317 BT485_WRITE(par, 0x40, BT485_CMD_1);
318 BT485_WRITE(par, 0x20, BT485_CMD_2); /* cursor off, for now */
319 BT485_WRITE(par, 0xff, BT485_PIXEL_MASK);
320
321 /* Fill palette registers. */
322 BT485_WRITE(par, 0x00, BT485_ADDR_PAL_WRITE);
323 TGA_WRITE_REG(par, BT485_DATA_PAL, TGA_RAMDAC_SETUP_REG);
324
325 for (i = 0; i < 256 * 3; i += 4) {
326 TGA_WRITE_REG(par, 0x55 | (BT485_DATA_PAL << 8),
327 TGA_RAMDAC_REG);
328 TGA_WRITE_REG(par, 0x00 | (BT485_DATA_PAL << 8),
329 TGA_RAMDAC_REG);
330 TGA_WRITE_REG(par, 0x00 | (BT485_DATA_PAL << 8),
331 TGA_RAMDAC_REG);
332 TGA_WRITE_REG(par, 0x00 | (BT485_DATA_PAL << 8),
333 TGA_RAMDAC_REG);
334 }
335
336 } else if (tga_type == TGA_TYPE_8PLANE && tga_bus_tc) {
337
338 /* Init BT459 RAMDAC registers. */
339 BT459_WRITE(par, BT459_REG_ACC, BT459_CMD_REG_0, 0x40);
340 BT459_WRITE(par, BT459_REG_ACC, BT459_CMD_REG_1, 0x00);
341 BT459_WRITE(par, BT459_REG_ACC, BT459_CMD_REG_2,
342 (par->sync_on_green ? 0xc0 : 0x40));
343
344 BT459_WRITE(par, BT459_REG_ACC, BT459_CUR_CMD_REG, 0x00);
345
346 /* Fill the palette. */
347 BT459_LOAD_ADDR(par, 0x0000);
348 TGA_WRITE_REG(par, BT459_PALETTE << 2, TGA_RAMDAC_SETUP_REG);
349
350 for (i = 0; i < 256 * 3; i += 4) {
351 TGA_WRITE_REG(par, 0x55, TGA_RAMDAC_REG);
352 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
353 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
354 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
355 }
356
357 } else { /* 24-plane or 24plusZ */
358
359 /* Init BT463 RAMDAC registers. */
360 BT463_WRITE(par, BT463_REG_ACC, BT463_CMD_REG_0, 0x40);
361 BT463_WRITE(par, BT463_REG_ACC, BT463_CMD_REG_1, 0x08);
362 BT463_WRITE(par, BT463_REG_ACC, BT463_CMD_REG_2,
363 (par->sync_on_green ? 0xc0 : 0x40));
364
365 BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_0, 0xff);
366 BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_1, 0xff);
367 BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_2, 0xff);
368 BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_3, 0x0f);
369
370 BT463_WRITE(par, BT463_REG_ACC, BT463_BLINK_MASK_0, 0x00);
371 BT463_WRITE(par, BT463_REG_ACC, BT463_BLINK_MASK_1, 0x00);
372 BT463_WRITE(par, BT463_REG_ACC, BT463_BLINK_MASK_2, 0x00);
373 BT463_WRITE(par, BT463_REG_ACC, BT463_BLINK_MASK_3, 0x00);
374
375 /* Fill the palette. */
376 BT463_LOAD_ADDR(par, 0x0000);
377 TGA_WRITE_REG(par, BT463_PALETTE << 2, TGA_RAMDAC_SETUP_REG);
378
379 #ifdef CONFIG_HW_CONSOLE
380 for (i = 0; i < 16; i++) {
381 int j = color_table[i];
382
383 TGA_WRITE_REG(par, default_red[j], TGA_RAMDAC_REG);
384 TGA_WRITE_REG(par, default_grn[j], TGA_RAMDAC_REG);
385 TGA_WRITE_REG(par, default_blu[j], TGA_RAMDAC_REG);
386 }
387 for (i = 0; i < 512 * 3; i += 4) {
388 #else
389 for (i = 0; i < 528 * 3; i += 4) {
390 #endif
391 TGA_WRITE_REG(par, 0x55, TGA_RAMDAC_REG);
392 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
393 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
394 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
395 }
396
397 /* Fill window type table after start of vertical retrace. */
398 while (!(TGA_READ_REG(par, TGA_INTR_STAT_REG) & 0x01))
399 continue;
400 TGA_WRITE_REG(par, 0x01, TGA_INTR_STAT_REG);
401 mb();
402 while (!(TGA_READ_REG(par, TGA_INTR_STAT_REG) & 0x01))
403 continue;
404 TGA_WRITE_REG(par, 0x01, TGA_INTR_STAT_REG);
405
406 BT463_LOAD_ADDR(par, BT463_WINDOW_TYPE_BASE);
407 TGA_WRITE_REG(par, BT463_REG_ACC << 2, TGA_RAMDAC_SETUP_REG);
408
409 for (i = 0; i < 16; i++) {
410 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
411 TGA_WRITE_REG(par, 0x01, TGA_RAMDAC_REG);
412 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
413 }
414
415 }
416
417 /* Finally, enable video scan (and pray for the monitor... :-) */
418 TGA_WRITE_REG(par, TGA_VALID_VIDEO, TGA_VALID_REG);
419
420 return 0;
421 }
422
423 #define DIFFCHECK(X) \
424 do { \
425 if (m <= 0x3f) { \
426 int delta = f - (TGA_PLL_BASE_FREQ * (X)) / (r << shift); \
427 if (delta < 0) \
428 delta = -delta; \
429 if (delta < min_diff) \
430 min_diff = delta, vm = m, va = a, vr = r; \
431 } \
432 } while (0)
433
434 static void
435 tgafb_set_pll(struct tga_par *par, int f)
436 {
437 int n, shift, base, min_diff, target;
438 int r,a,m,vm = 34, va = 1, vr = 30;
439
440 for (r = 0 ; r < 12 ; r++)
441 TGA_WRITE_REG(par, !r, TGA_CLOCK_REG);
442
443 if (f > TGA_PLL_MAX_FREQ)
444 f = TGA_PLL_MAX_FREQ;
445
446 if (f >= TGA_PLL_MAX_FREQ / 2)
447 shift = 0;
448 else if (f >= TGA_PLL_MAX_FREQ / 4)
449 shift = 1;
450 else
451 shift = 2;
452
453 TGA_WRITE_REG(par, shift & 1, TGA_CLOCK_REG);
454 TGA_WRITE_REG(par, shift >> 1, TGA_CLOCK_REG);
455
456 for (r = 0 ; r < 10 ; r++)
457 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
458
459 if (f <= 120000) {
460 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
461 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
462 }
463 else if (f <= 200000) {
464 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
465 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
466 }
467 else {
468 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
469 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
470 }
471
472 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
473 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
474 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
475 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
476 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
477 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
478
479 target = (f << shift) / TGA_PLL_BASE_FREQ;
480 min_diff = TGA_PLL_MAX_FREQ;
481
482 r = 7 / target;
483 if (!r) r = 1;
484
485 base = target * r;
486 while (base < 449) {
487 for (n = base < 7 ? 7 : base; n < base + target && n < 449; n++) {
488 m = ((n + 3) / 7) - 1;
489 a = 0;
490 DIFFCHECK((m + 1) * 7);
491 m++;
492 DIFFCHECK((m + 1) * 7);
493 m = (n / 6) - 1;
494 if ((a = n % 6))
495 DIFFCHECK(n);
496 }
497 r++;
498 base += target;
499 }
500
501 vr--;
502
503 for (r = 0; r < 8; r++)
504 TGA_WRITE_REG(par, (vm >> r) & 1, TGA_CLOCK_REG);
505 for (r = 0; r < 8 ; r++)
506 TGA_WRITE_REG(par, (va >> r) & 1, TGA_CLOCK_REG);
507 for (r = 0; r < 7 ; r++)
508 TGA_WRITE_REG(par, (vr >> r) & 1, TGA_CLOCK_REG);
509 TGA_WRITE_REG(par, ((vr >> 7) & 1)|2, TGA_CLOCK_REG);
510 }
511
512
513 /**
514 * tgafb_setcolreg - Optional function. Sets a color register.
515 * @regno: boolean, 0 copy local, 1 get_user() function
516 * @red: frame buffer colormap structure
517 * @green: The green value which can be up to 16 bits wide
518 * @blue: The blue value which can be up to 16 bits wide.
519 * @transp: If supported the alpha value which can be up to 16 bits wide.
520 * @info: frame buffer info structure
521 */
522 static int
523 tgafb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue,
524 unsigned transp, struct fb_info *info)
525 {
526 struct tga_par *par = (struct tga_par *) info->par;
527 int tga_bus_pci = TGA_BUS_PCI(par->dev);
528 int tga_bus_tc = TGA_BUS_TC(par->dev);
529
530 if (regno > 255)
531 return 1;
532 red >>= 8;
533 green >>= 8;
534 blue >>= 8;
535
536 if (par->tga_type == TGA_TYPE_8PLANE && tga_bus_pci) {
537 BT485_WRITE(par, regno, BT485_ADDR_PAL_WRITE);
538 TGA_WRITE_REG(par, BT485_DATA_PAL, TGA_RAMDAC_SETUP_REG);
539 TGA_WRITE_REG(par, red|(BT485_DATA_PAL<<8),TGA_RAMDAC_REG);
540 TGA_WRITE_REG(par, green|(BT485_DATA_PAL<<8),TGA_RAMDAC_REG);
541 TGA_WRITE_REG(par, blue|(BT485_DATA_PAL<<8),TGA_RAMDAC_REG);
542 } else if (par->tga_type == TGA_TYPE_8PLANE && tga_bus_tc) {
543 BT459_LOAD_ADDR(par, regno);
544 TGA_WRITE_REG(par, BT459_PALETTE << 2, TGA_RAMDAC_SETUP_REG);
545 TGA_WRITE_REG(par, red, TGA_RAMDAC_REG);
546 TGA_WRITE_REG(par, green, TGA_RAMDAC_REG);
547 TGA_WRITE_REG(par, blue, TGA_RAMDAC_REG);
548 } else {
549 if (regno < 16) {
550 u32 value = (regno << 16) | (regno << 8) | regno;
551 ((u32 *)info->pseudo_palette)[regno] = value;
552 }
553 BT463_LOAD_ADDR(par, regno);
554 TGA_WRITE_REG(par, BT463_PALETTE << 2, TGA_RAMDAC_SETUP_REG);
555 TGA_WRITE_REG(par, red, TGA_RAMDAC_REG);
556 TGA_WRITE_REG(par, green, TGA_RAMDAC_REG);
557 TGA_WRITE_REG(par, blue, TGA_RAMDAC_REG);
558 }
559
560 return 0;
561 }
562
563
564 /**
565 * tgafb_blank - Optional function. Blanks the display.
566 * @blank_mode: the blank mode we want.
567 * @info: frame buffer structure that represents a single frame buffer
568 */
569 static int
570 tgafb_blank(int blank, struct fb_info *info)
571 {
572 struct tga_par *par = (struct tga_par *) info->par;
573 u32 vhcr, vvcr, vvvr;
574 unsigned long flags;
575
576 local_irq_save(flags);
577
578 vhcr = TGA_READ_REG(par, TGA_HORIZ_REG);
579 vvcr = TGA_READ_REG(par, TGA_VERT_REG);
580 vvvr = TGA_READ_REG(par, TGA_VALID_REG);
581 vvvr &= ~(TGA_VALID_VIDEO | TGA_VALID_BLANK);
582
583 switch (blank) {
584 case FB_BLANK_UNBLANK: /* Unblanking */
585 if (par->vesa_blanked) {
586 TGA_WRITE_REG(par, vhcr & 0xbfffffff, TGA_HORIZ_REG);
587 TGA_WRITE_REG(par, vvcr & 0xbfffffff, TGA_VERT_REG);
588 par->vesa_blanked = 0;
589 }
590 TGA_WRITE_REG(par, vvvr | TGA_VALID_VIDEO, TGA_VALID_REG);
591 break;
592
593 case FB_BLANK_NORMAL: /* Normal blanking */
594 TGA_WRITE_REG(par, vvvr | TGA_VALID_VIDEO | TGA_VALID_BLANK,
595 TGA_VALID_REG);
596 break;
597
598 case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
599 TGA_WRITE_REG(par, vvcr | 0x40000000, TGA_VERT_REG);
600 TGA_WRITE_REG(par, vvvr | TGA_VALID_BLANK, TGA_VALID_REG);
601 par->vesa_blanked = 1;
602 break;
603
604 case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
605 TGA_WRITE_REG(par, vhcr | 0x40000000, TGA_HORIZ_REG);
606 TGA_WRITE_REG(par, vvvr | TGA_VALID_BLANK, TGA_VALID_REG);
607 par->vesa_blanked = 1;
608 break;
609
610 case FB_BLANK_POWERDOWN: /* Poweroff */
611 TGA_WRITE_REG(par, vhcr | 0x40000000, TGA_HORIZ_REG);
612 TGA_WRITE_REG(par, vvcr | 0x40000000, TGA_VERT_REG);
613 TGA_WRITE_REG(par, vvvr | TGA_VALID_BLANK, TGA_VALID_REG);
614 par->vesa_blanked = 1;
615 break;
616 }
617
618 local_irq_restore(flags);
619 return 0;
620 }
621
622
623 /*
624 * Acceleration.
625 */
626
627 static void
628 tgafb_mono_imageblit(struct fb_info *info, const struct fb_image *image)
629 {
630 struct tga_par *par = (struct tga_par *) info->par;
631 u32 fgcolor, bgcolor, dx, dy, width, height, vxres, vyres, pixelmask;
632 unsigned long rincr, line_length, shift, pos, is8bpp;
633 unsigned long i, j;
634 const unsigned char *data;
635 void __iomem *regs_base;
636 void __iomem *fb_base;
637
638 is8bpp = info->var.bits_per_pixel == 8;
639
640 dx = image->dx;
641 dy = image->dy;
642 width = image->width;
643 height = image->height;
644 vxres = info->var.xres_virtual;
645 vyres = info->var.yres_virtual;
646 line_length = info->fix.line_length;
647 rincr = (width + 7) / 8;
648
649 /* A shift below cannot cope with. */
650 if (unlikely(width == 0))
651 return;
652 /* Crop the image to the screen. */
653 if (dx > vxres || dy > vyres)
654 return;
655 if (dx + width > vxres)
656 width = vxres - dx;
657 if (dy + height > vyres)
658 height = vyres - dy;
659
660 regs_base = par->tga_regs_base;
661 fb_base = par->tga_fb_base;
662
663 /* Expand the color values to fill 32-bits. */
664 /* ??? Would be nice to notice colour changes elsewhere, so
665 that we can do this only when necessary. */
666 fgcolor = image->fg_color;
667 bgcolor = image->bg_color;
668 if (is8bpp) {
669 fgcolor |= fgcolor << 8;
670 fgcolor |= fgcolor << 16;
671 bgcolor |= bgcolor << 8;
672 bgcolor |= bgcolor << 16;
673 } else {
674 if (fgcolor < 16)
675 fgcolor = ((u32 *)info->pseudo_palette)[fgcolor];
676 if (bgcolor < 16)
677 bgcolor = ((u32 *)info->pseudo_palette)[bgcolor];
678 }
679 __raw_writel(fgcolor, regs_base + TGA_FOREGROUND_REG);
680 __raw_writel(bgcolor, regs_base + TGA_BACKGROUND_REG);
681
682 /* Acquire proper alignment; set up the PIXELMASK register
683 so that we only write the proper character cell. */
684 pos = dy * line_length;
685 if (is8bpp) {
686 pos += dx;
687 shift = pos & 3;
688 pos &= -4;
689 } else {
690 pos += dx * 4;
691 shift = (pos & 7) >> 2;
692 pos &= -8;
693 }
694
695 data = (const unsigned char *) image->data;
696
697 /* Enable opaque stipple mode. */
698 __raw_writel((is8bpp
699 ? TGA_MODE_SBM_8BPP | TGA_MODE_OPAQUE_STIPPLE
700 : TGA_MODE_SBM_24BPP | TGA_MODE_OPAQUE_STIPPLE),
701 regs_base + TGA_MODE_REG);
702
703 if (width + shift <= 32) {
704 unsigned long bwidth;
705
706 /* Handle common case of imaging a single character, in
707 a font less than or 32 pixels wide. */
708
709 /* Avoid a shift by 32; width > 0 implied. */
710 pixelmask = (2ul << (width - 1)) - 1;
711 pixelmask <<= shift;
712 __raw_writel(pixelmask, regs_base + TGA_PIXELMASK_REG);
713 wmb();
714
715 bwidth = (width + 7) / 8;
716
717 for (i = 0; i < height; ++i) {
718 u32 mask = 0;
719
720 /* The image data is bit big endian; we need
721 little endian. */
722 for (j = 0; j < bwidth; ++j)
723 mask |= bitrev8(data[j]) << (j * 8);
724
725 __raw_writel(mask << shift, fb_base + pos);
726
727 pos += line_length;
728 data += rincr;
729 }
730 wmb();
731 __raw_writel(0xffffffff, regs_base + TGA_PIXELMASK_REG);
732 } else if (shift == 0) {
733 unsigned long pos0 = pos;
734 const unsigned char *data0 = data;
735 unsigned long bincr = (is8bpp ? 8 : 8*4);
736 unsigned long bwidth;
737
738 /* Handle another common case in which accel_putcs
739 generates a large bitmap, which happens to be aligned.
740 Allow the tail to be misaligned. This case is
741 interesting because we've not got to hold partial
742 bytes across the words being written. */
743
744 wmb();
745
746 bwidth = (width / 8) & -4;
747 for (i = 0; i < height; ++i) {
748 for (j = 0; j < bwidth; j += 4) {
749 u32 mask = 0;
750 mask |= bitrev8(data[j+0]) << (0 * 8);
751 mask |= bitrev8(data[j+1]) << (1 * 8);
752 mask |= bitrev8(data[j+2]) << (2 * 8);
753 mask |= bitrev8(data[j+3]) << (3 * 8);
754 __raw_writel(mask, fb_base + pos + j*bincr);
755 }
756 pos += line_length;
757 data += rincr;
758 }
759 wmb();
760
761 pixelmask = (1ul << (width & 31)) - 1;
762 if (pixelmask) {
763 __raw_writel(pixelmask, regs_base + TGA_PIXELMASK_REG);
764 wmb();
765
766 pos = pos0 + bwidth*bincr;
767 data = data0 + bwidth;
768 bwidth = ((width & 31) + 7) / 8;
769
770 for (i = 0; i < height; ++i) {
771 u32 mask = 0;
772 for (j = 0; j < bwidth; ++j)
773 mask |= bitrev8(data[j]) << (j * 8);
774 __raw_writel(mask, fb_base + pos);
775 pos += line_length;
776 data += rincr;
777 }
778 wmb();
779 __raw_writel(0xffffffff, regs_base + TGA_PIXELMASK_REG);
780 }
781 } else {
782 unsigned long pos0 = pos;
783 const unsigned char *data0 = data;
784 unsigned long bincr = (is8bpp ? 8 : 8*4);
785 unsigned long bwidth;
786
787 /* Finally, handle the generic case of misaligned start.
788 Here we split the write into 16-bit spans. This allows
789 us to use only one pixel mask, instead of four as would
790 be required by writing 24-bit spans. */
791
792 pixelmask = 0xffff << shift;
793 __raw_writel(pixelmask, regs_base + TGA_PIXELMASK_REG);
794 wmb();
795
796 bwidth = (width / 8) & -2;
797 for (i = 0; i < height; ++i) {
798 for (j = 0; j < bwidth; j += 2) {
799 u32 mask = 0;
800 mask |= bitrev8(data[j+0]) << (0 * 8);
801 mask |= bitrev8(data[j+1]) << (1 * 8);
802 mask <<= shift;
803 __raw_writel(mask, fb_base + pos + j*bincr);
804 }
805 pos += line_length;
806 data += rincr;
807 }
808 wmb();
809
810 pixelmask = ((1ul << (width & 15)) - 1) << shift;
811 if (pixelmask) {
812 __raw_writel(pixelmask, regs_base + TGA_PIXELMASK_REG);
813 wmb();
814
815 pos = pos0 + bwidth*bincr;
816 data = data0 + bwidth;
817 bwidth = (width & 15) > 8;
818
819 for (i = 0; i < height; ++i) {
820 u32 mask = bitrev8(data[0]);
821 if (bwidth)
822 mask |= bitrev8(data[1]) << 8;
823 mask <<= shift;
824 __raw_writel(mask, fb_base + pos);
825 pos += line_length;
826 data += rincr;
827 }
828 wmb();
829 }
830 __raw_writel(0xffffffff, regs_base + TGA_PIXELMASK_REG);
831 }
832
833 /* Disable opaque stipple mode. */
834 __raw_writel((is8bpp
835 ? TGA_MODE_SBM_8BPP | TGA_MODE_SIMPLE
836 : TGA_MODE_SBM_24BPP | TGA_MODE_SIMPLE),
837 regs_base + TGA_MODE_REG);
838 }
839
840 static void
841 tgafb_clut_imageblit(struct fb_info *info, const struct fb_image *image)
842 {
843 struct tga_par *par = (struct tga_par *) info->par;
844 u32 color, dx, dy, width, height, vxres, vyres;
845 u32 *palette = ((u32 *)info->pseudo_palette);
846 unsigned long pos, line_length, i, j;
847 const unsigned char *data;
848 void __iomem *regs_base, *fb_base;
849
850 dx = image->dx;
851 dy = image->dy;
852 width = image->width;
853 height = image->height;
854 vxres = info->var.xres_virtual;
855 vyres = info->var.yres_virtual;
856 line_length = info->fix.line_length;
857
858 /* Crop the image to the screen. */
859 if (dx > vxres || dy > vyres)
860 return;
861 if (dx + width > vxres)
862 width = vxres - dx;
863 if (dy + height > vyres)
864 height = vyres - dy;
865
866 regs_base = par->tga_regs_base;
867 fb_base = par->tga_fb_base;
868
869 pos = dy * line_length + (dx * 4);
870 data = image->data;
871
872 /* Now copy the image, color_expanding via the palette. */
873 for (i = 0; i < height; i++) {
874 for (j = 0; j < width; j++) {
875 color = palette[*data++];
876 __raw_writel(color, fb_base + pos + j*4);
877 }
878 pos += line_length;
879 }
880 }
881
882 /**
883 * tgafb_imageblit - REQUIRED function. Can use generic routines if
884 * non acclerated hardware and packed pixel based.
885 * Copies a image from system memory to the screen.
886 *
887 * @info: frame buffer structure that represents a single frame buffer
888 * @image: structure defining the image.
889 */
890 static void
891 tgafb_imageblit(struct fb_info *info, const struct fb_image *image)
892 {
893 unsigned int is8bpp = info->var.bits_per_pixel == 8;
894
895 /* If a mono image, regardless of FB depth, go do it. */
896 if (image->depth == 1) {
897 tgafb_mono_imageblit(info, image);
898 return;
899 }
900
901 /* For copies that aren't pixel expansion, there's little we
902 can do better than the generic code. */
903 /* ??? There is a DMA write mode; I wonder if that could be
904 made to pull the data from the image buffer... */
905 if (image->depth == info->var.bits_per_pixel) {
906 cfb_imageblit(info, image);
907 return;
908 }
909
910 /* If 24-plane FB and the image is 8-plane with CLUT, we can do it. */
911 if (!is8bpp && image->depth == 8) {
912 tgafb_clut_imageblit(info, image);
913 return;
914 }
915
916 /* Silently return... */
917 }
918
919 /**
920 * tgafb_fillrect - REQUIRED function. Can use generic routines if
921 * non acclerated hardware and packed pixel based.
922 * Draws a rectangle on the screen.
923 *
924 * @info: frame buffer structure that represents a single frame buffer
925 * @rect: structure defining the rectagle and operation.
926 */
927 static void
928 tgafb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
929 {
930 struct tga_par *par = (struct tga_par *) info->par;
931 int is8bpp = info->var.bits_per_pixel == 8;
932 u32 dx, dy, width, height, vxres, vyres, color;
933 unsigned long pos, align, line_length, i, j;
934 void __iomem *regs_base;
935 void __iomem *fb_base;
936
937 dx = rect->dx;
938 dy = rect->dy;
939 width = rect->width;
940 height = rect->height;
941 vxres = info->var.xres_virtual;
942 vyres = info->var.yres_virtual;
943 line_length = info->fix.line_length;
944 regs_base = par->tga_regs_base;
945 fb_base = par->tga_fb_base;
946
947 /* Crop the rectangle to the screen. */
948 if (dx > vxres || dy > vyres || !width || !height)
949 return;
950 if (dx + width > vxres)
951 width = vxres - dx;
952 if (dy + height > vyres)
953 height = vyres - dy;
954
955 pos = dy * line_length + dx * (is8bpp ? 1 : 4);
956
957 /* ??? We could implement ROP_XOR with opaque fill mode
958 and a RasterOp setting of GXxor, but as far as I can
959 tell, this mode is not actually used in the kernel.
960 Thus I am ignoring it for now. */
961 if (rect->rop != ROP_COPY) {
962 cfb_fillrect(info, rect);
963 return;
964 }
965
966 /* Expand the color value to fill 8 pixels. */
967 color = rect->color;
968 if (is8bpp) {
969 color |= color << 8;
970 color |= color << 16;
971 __raw_writel(color, regs_base + TGA_BLOCK_COLOR0_REG);
972 __raw_writel(color, regs_base + TGA_BLOCK_COLOR1_REG);
973 } else {
974 if (color < 16)
975 color = ((u32 *)info->pseudo_palette)[color];
976 __raw_writel(color, regs_base + TGA_BLOCK_COLOR0_REG);
977 __raw_writel(color, regs_base + TGA_BLOCK_COLOR1_REG);
978 __raw_writel(color, regs_base + TGA_BLOCK_COLOR2_REG);
979 __raw_writel(color, regs_base + TGA_BLOCK_COLOR3_REG);
980 __raw_writel(color, regs_base + TGA_BLOCK_COLOR4_REG);
981 __raw_writel(color, regs_base + TGA_BLOCK_COLOR5_REG);
982 __raw_writel(color, regs_base + TGA_BLOCK_COLOR6_REG);
983 __raw_writel(color, regs_base + TGA_BLOCK_COLOR7_REG);
984 }
985
986 /* The DATA register holds the fill mask for block fill mode.
987 Since we're not stippling, this is all ones. */
988 __raw_writel(0xffffffff, regs_base + TGA_DATA_REG);
989
990 /* Enable block fill mode. */
991 __raw_writel((is8bpp
992 ? TGA_MODE_SBM_8BPP | TGA_MODE_BLOCK_FILL
993 : TGA_MODE_SBM_24BPP | TGA_MODE_BLOCK_FILL),
994 regs_base + TGA_MODE_REG);
995 wmb();
996
997 /* We can fill 2k pixels per operation. Notice blocks that fit
998 the width of the screen so that we can take advantage of this
999 and fill more than one line per write. */
1000 if (width == line_length)
1001 width *= height, height = 1;
1002
1003 /* The write into the frame buffer must be aligned to 4 bytes,
1004 but we are allowed to encode the offset within the word in
1005 the data word written. */
1006 align = (pos & 3) << 16;
1007 pos &= -4;
1008
1009 if (width <= 2048) {
1010 u32 data;
1011
1012 data = (width - 1) | align;
1013
1014 for (i = 0; i < height; ++i) {
1015 __raw_writel(data, fb_base + pos);
1016 pos += line_length;
1017 }
1018 } else {
1019 unsigned long Bpp = (is8bpp ? 1 : 4);
1020 unsigned long nwidth = width & -2048;
1021 u32 fdata, ldata;
1022
1023 fdata = (2048 - 1) | align;
1024 ldata = ((width & 2047) - 1) | align;
1025
1026 for (i = 0; i < height; ++i) {
1027 for (j = 0; j < nwidth; j += 2048)
1028 __raw_writel(fdata, fb_base + pos + j*Bpp);
1029 if (j < width)
1030 __raw_writel(ldata, fb_base + pos + j*Bpp);
1031 pos += line_length;
1032 }
1033 }
1034 wmb();
1035
1036 /* Disable block fill mode. */
1037 __raw_writel((is8bpp
1038 ? TGA_MODE_SBM_8BPP | TGA_MODE_SIMPLE
1039 : TGA_MODE_SBM_24BPP | TGA_MODE_SIMPLE),
1040 regs_base + TGA_MODE_REG);
1041 }
1042
1043 /**
1044 * tgafb_copyarea - REQUIRED function. Can use generic routines if
1045 * non acclerated hardware and packed pixel based.
1046 * Copies on area of the screen to another area.
1047 *
1048 * @info: frame buffer structure that represents a single frame buffer
1049 * @area: structure defining the source and destination.
1050 */
1051
1052 /* Handle the special case of copying entire lines, e.g. during scrolling.
1053 We can avoid a lot of needless computation in this case. In the 8bpp
1054 case we need to use the COPY64 registers instead of mask writes into
1055 the frame buffer to achieve maximum performance. */
1056
1057 static inline void
1058 copyarea_line_8bpp(struct fb_info *info, u32 dy, u32 sy,
1059 u32 height, u32 width)
1060 {
1061 struct tga_par *par = (struct tga_par *) info->par;
1062 void __iomem *tga_regs = par->tga_regs_base;
1063 unsigned long dpos, spos, i, n64;
1064
1065 /* Set up the MODE and PIXELSHIFT registers. */
1066 __raw_writel(TGA_MODE_SBM_8BPP | TGA_MODE_COPY, tga_regs+TGA_MODE_REG);
1067 __raw_writel(0, tga_regs+TGA_PIXELSHIFT_REG);
1068 wmb();
1069
1070 n64 = (height * width) / 64;
1071
1072 if (sy < dy) {
1073 spos = (sy + height) * width;
1074 dpos = (dy + height) * width;
1075
1076 for (i = 0; i < n64; ++i) {
1077 spos -= 64;
1078 dpos -= 64;
1079 __raw_writel(spos, tga_regs+TGA_COPY64_SRC);
1080 wmb();
1081 __raw_writel(dpos, tga_regs+TGA_COPY64_DST);
1082 wmb();
1083 }
1084 } else {
1085 spos = sy * width;
1086 dpos = dy * width;
1087
1088 for (i = 0; i < n64; ++i) {
1089 __raw_writel(spos, tga_regs+TGA_COPY64_SRC);
1090 wmb();
1091 __raw_writel(dpos, tga_regs+TGA_COPY64_DST);
1092 wmb();
1093 spos += 64;
1094 dpos += 64;
1095 }
1096 }
1097
1098 /* Reset the MODE register to normal. */
1099 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_SIMPLE, tga_regs+TGA_MODE_REG);
1100 }
1101
1102 static inline void
1103 copyarea_line_32bpp(struct fb_info *info, u32 dy, u32 sy,
1104 u32 height, u32 width)
1105 {
1106 struct tga_par *par = (struct tga_par *) info->par;
1107 void __iomem *tga_regs = par->tga_regs_base;
1108 void __iomem *tga_fb = par->tga_fb_base;
1109 void __iomem *src;
1110 void __iomem *dst;
1111 unsigned long i, n16;
1112
1113 /* Set up the MODE and PIXELSHIFT registers. */
1114 __raw_writel(TGA_MODE_SBM_24BPP | TGA_MODE_COPY, tga_regs+TGA_MODE_REG);
1115 __raw_writel(0, tga_regs+TGA_PIXELSHIFT_REG);
1116 wmb();
1117
1118 n16 = (height * width) / 16;
1119
1120 if (sy < dy) {
1121 src = tga_fb + (sy + height) * width * 4;
1122 dst = tga_fb + (dy + height) * width * 4;
1123
1124 for (i = 0; i < n16; ++i) {
1125 src -= 64;
1126 dst -= 64;
1127 __raw_writel(0xffff, src);
1128 wmb();
1129 __raw_writel(0xffff, dst);
1130 wmb();
1131 }
1132 } else {
1133 src = tga_fb + sy * width * 4;
1134 dst = tga_fb + dy * width * 4;
1135
1136 for (i = 0; i < n16; ++i) {
1137 __raw_writel(0xffff, src);
1138 wmb();
1139 __raw_writel(0xffff, dst);
1140 wmb();
1141 src += 64;
1142 dst += 64;
1143 }
1144 }
1145
1146 /* Reset the MODE register to normal. */
1147 __raw_writel(TGA_MODE_SBM_24BPP|TGA_MODE_SIMPLE, tga_regs+TGA_MODE_REG);
1148 }
1149
1150 /* The general case of forward copy in 8bpp mode. */
1151 static inline void
1152 copyarea_foreward_8bpp(struct fb_info *info, u32 dx, u32 dy, u32 sx, u32 sy,
1153 u32 height, u32 width, u32 line_length)
1154 {
1155 struct tga_par *par = (struct tga_par *) info->par;
1156 unsigned long i, copied, left;
1157 unsigned long dpos, spos, dalign, salign, yincr;
1158 u32 smask_first, dmask_first, dmask_last;
1159 int pixel_shift, need_prime, need_second;
1160 unsigned long n64, n32, xincr_first;
1161 void __iomem *tga_regs;
1162 void __iomem *tga_fb;
1163
1164 yincr = line_length;
1165 if (dy > sy) {
1166 dy += height - 1;
1167 sy += height - 1;
1168 yincr = -yincr;
1169 }
1170
1171 /* Compute the offsets and alignments in the frame buffer.
1172 More than anything else, these control how we do copies. */
1173 dpos = dy * line_length + dx;
1174 spos = sy * line_length + sx;
1175 dalign = dpos & 7;
1176 salign = spos & 7;
1177 dpos &= -8;
1178 spos &= -8;
1179
1180 /* Compute the value for the PIXELSHIFT register. This controls
1181 both non-co-aligned source and destination and copy direction. */
1182 if (dalign >= salign)
1183 pixel_shift = dalign - salign;
1184 else
1185 pixel_shift = 8 - (salign - dalign);
1186
1187 /* Figure out if we need an additional priming step for the
1188 residue register. */
1189 need_prime = (salign > dalign);
1190 if (need_prime)
1191 dpos -= 8;
1192
1193 /* Begin by copying the leading unaligned destination. Copy enough
1194 to make the next destination address 32-byte aligned. */
1195 copied = 32 - (dalign + (dpos & 31));
1196 if (copied == 32)
1197 copied = 0;
1198 xincr_first = (copied + 7) & -8;
1199 smask_first = dmask_first = (1ul << copied) - 1;
1200 smask_first <<= salign;
1201 dmask_first <<= dalign + need_prime*8;
1202 if (need_prime && copied > 24)
1203 copied -= 8;
1204 left = width - copied;
1205
1206 /* Care for small copies. */
1207 if (copied > width) {
1208 u32 t;
1209 t = (1ul << width) - 1;
1210 t <<= dalign + need_prime*8;
1211 dmask_first &= t;
1212 left = 0;
1213 }
1214
1215 /* Attempt to use 64-byte copies. This is only possible if the
1216 source and destination are co-aligned at 64 bytes. */
1217 n64 = need_second = 0;
1218 if ((dpos & 63) == (spos & 63)
1219 && (height == 1 || line_length % 64 == 0)) {
1220 /* We may need a 32-byte copy to ensure 64 byte alignment. */
1221 need_second = (dpos + xincr_first) & 63;
1222 if ((need_second & 32) != need_second)
1223 printk(KERN_ERR "tgafb: need_second wrong\n");
1224 if (left >= need_second + 64) {
1225 left -= need_second;
1226 n64 = left / 64;
1227 left %= 64;
1228 } else
1229 need_second = 0;
1230 }
1231
1232 /* Copy trailing full 32-byte sections. This will be the main
1233 loop if the 64 byte loop can't be used. */
1234 n32 = left / 32;
1235 left %= 32;
1236
1237 /* Copy the trailing unaligned destination. */
1238 dmask_last = (1ul << left) - 1;
1239
1240 tga_regs = par->tga_regs_base;
1241 tga_fb = par->tga_fb_base;
1242
1243 /* Set up the MODE and PIXELSHIFT registers. */
1244 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_COPY, tga_regs+TGA_MODE_REG);
1245 __raw_writel(pixel_shift, tga_regs+TGA_PIXELSHIFT_REG);
1246 wmb();
1247
1248 for (i = 0; i < height; ++i) {
1249 unsigned long j;
1250 void __iomem *sfb;
1251 void __iomem *dfb;
1252
1253 sfb = tga_fb + spos;
1254 dfb = tga_fb + dpos;
1255 if (dmask_first) {
1256 __raw_writel(smask_first, sfb);
1257 wmb();
1258 __raw_writel(dmask_first, dfb);
1259 wmb();
1260 sfb += xincr_first;
1261 dfb += xincr_first;
1262 }
1263
1264 if (need_second) {
1265 __raw_writel(0xffffffff, sfb);
1266 wmb();
1267 __raw_writel(0xffffffff, dfb);
1268 wmb();
1269 sfb += 32;
1270 dfb += 32;
1271 }
1272
1273 if (n64 && (((unsigned long)sfb | (unsigned long)dfb) & 63))
1274 printk(KERN_ERR
1275 "tgafb: misaligned copy64 (s:%p, d:%p)\n",
1276 sfb, dfb);
1277
1278 for (j = 0; j < n64; ++j) {
1279 __raw_writel(sfb - tga_fb, tga_regs+TGA_COPY64_SRC);
1280 wmb();
1281 __raw_writel(dfb - tga_fb, tga_regs+TGA_COPY64_DST);
1282 wmb();
1283 sfb += 64;
1284 dfb += 64;
1285 }
1286
1287 for (j = 0; j < n32; ++j) {
1288 __raw_writel(0xffffffff, sfb);
1289 wmb();
1290 __raw_writel(0xffffffff, dfb);
1291 wmb();
1292 sfb += 32;
1293 dfb += 32;
1294 }
1295
1296 if (dmask_last) {
1297 __raw_writel(0xffffffff, sfb);
1298 wmb();
1299 __raw_writel(dmask_last, dfb);
1300 wmb();
1301 }
1302
1303 spos += yincr;
1304 dpos += yincr;
1305 }
1306
1307 /* Reset the MODE register to normal. */
1308 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_SIMPLE, tga_regs+TGA_MODE_REG);
1309 }
1310
1311 /* The (almost) general case of backward copy in 8bpp mode. */
1312 static inline void
1313 copyarea_backward_8bpp(struct fb_info *info, u32 dx, u32 dy, u32 sx, u32 sy,
1314 u32 height, u32 width, u32 line_length,
1315 const struct fb_copyarea *area)
1316 {
1317 struct tga_par *par = (struct tga_par *) info->par;
1318 unsigned long i, left, yincr;
1319 unsigned long depos, sepos, dealign, sealign;
1320 u32 mask_first, mask_last;
1321 unsigned long n32;
1322 void __iomem *tga_regs;
1323 void __iomem *tga_fb;
1324
1325 yincr = line_length;
1326 if (dy > sy) {
1327 dy += height - 1;
1328 sy += height - 1;
1329 yincr = -yincr;
1330 }
1331
1332 /* Compute the offsets and alignments in the frame buffer.
1333 More than anything else, these control how we do copies. */
1334 depos = dy * line_length + dx + width;
1335 sepos = sy * line_length + sx + width;
1336 dealign = depos & 7;
1337 sealign = sepos & 7;
1338
1339 /* ??? The documentation appears to be incorrect (or very
1340 misleading) wrt how pixel shifting works in backward copy
1341 mode, i.e. when PIXELSHIFT is negative. I give up for now.
1342 Do handle the common case of co-aligned backward copies,
1343 but frob everything else back on generic code. */
1344 if (dealign != sealign) {
1345 cfb_copyarea(info, area);
1346 return;
1347 }
1348
1349 /* We begin the copy with the trailing pixels of the
1350 unaligned destination. */
1351 mask_first = (1ul << dealign) - 1;
1352 left = width - dealign;
1353
1354 /* Care for small copies. */
1355 if (dealign > width) {
1356 mask_first ^= (1ul << (dealign - width)) - 1;
1357 left = 0;
1358 }
1359
1360 /* Next copy full words at a time. */
1361 n32 = left / 32;
1362 left %= 32;
1363
1364 /* Finally copy the unaligned head of the span. */
1365 mask_last = -1 << (32 - left);
1366
1367 tga_regs = par->tga_regs_base;
1368 tga_fb = par->tga_fb_base;
1369
1370 /* Set up the MODE and PIXELSHIFT registers. */
1371 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_COPY, tga_regs+TGA_MODE_REG);
1372 __raw_writel(0, tga_regs+TGA_PIXELSHIFT_REG);
1373 wmb();
1374
1375 for (i = 0; i < height; ++i) {
1376 unsigned long j;
1377 void __iomem *sfb;
1378 void __iomem *dfb;
1379
1380 sfb = tga_fb + sepos;
1381 dfb = tga_fb + depos;
1382 if (mask_first) {
1383 __raw_writel(mask_first, sfb);
1384 wmb();
1385 __raw_writel(mask_first, dfb);
1386 wmb();
1387 }
1388
1389 for (j = 0; j < n32; ++j) {
1390 sfb -= 32;
1391 dfb -= 32;
1392 __raw_writel(0xffffffff, sfb);
1393 wmb();
1394 __raw_writel(0xffffffff, dfb);
1395 wmb();
1396 }
1397
1398 if (mask_last) {
1399 sfb -= 32;
1400 dfb -= 32;
1401 __raw_writel(mask_last, sfb);
1402 wmb();
1403 __raw_writel(mask_last, dfb);
1404 wmb();
1405 }
1406
1407 sepos += yincr;
1408 depos += yincr;
1409 }
1410
1411 /* Reset the MODE register to normal. */
1412 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_SIMPLE, tga_regs+TGA_MODE_REG);
1413 }
1414
1415 static void
1416 tgafb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
1417 {
1418 unsigned long dx, dy, width, height, sx, sy, vxres, vyres;
1419 unsigned long line_length, bpp;
1420
1421 dx = area->dx;
1422 dy = area->dy;
1423 width = area->width;
1424 height = area->height;
1425 sx = area->sx;
1426 sy = area->sy;
1427 vxres = info->var.xres_virtual;
1428 vyres = info->var.yres_virtual;
1429 line_length = info->fix.line_length;
1430
1431 /* The top left corners must be in the virtual screen. */
1432 if (dx > vxres || sx > vxres || dy > vyres || sy > vyres)
1433 return;
1434
1435 /* Clip the destination. */
1436 if (dx + width > vxres)
1437 width = vxres - dx;
1438 if (dy + height > vyres)
1439 height = vyres - dy;
1440
1441 /* The source must be completely inside the virtual screen. */
1442 if (sx + width > vxres || sy + height > vyres)
1443 return;
1444
1445 bpp = info->var.bits_per_pixel;
1446
1447 /* Detect copies of the entire line. */
1448 if (width * (bpp >> 3) == line_length) {
1449 if (bpp == 8)
1450 copyarea_line_8bpp(info, dy, sy, height, width);
1451 else
1452 copyarea_line_32bpp(info, dy, sy, height, width);
1453 }
1454
1455 /* ??? The documentation is unclear to me exactly how the pixelshift
1456 register works in 32bpp mode. Since I don't have hardware to test,
1457 give up for now and fall back on the generic routines. */
1458 else if (bpp == 32)
1459 cfb_copyarea(info, area);
1460
1461 /* Detect overlapping source and destination that requires
1462 a backward copy. */
1463 else if (dy == sy && dx > sx && dx < sx + width)
1464 copyarea_backward_8bpp(info, dx, dy, sx, sy, height,
1465 width, line_length, area);
1466 else
1467 copyarea_foreward_8bpp(info, dx, dy, sx, sy, height,
1468 width, line_length);
1469 }
1470
1471
1472 /*
1473 * Initialisation
1474 */
1475
1476 static void
1477 tgafb_init_fix(struct fb_info *info)
1478 {
1479 struct tga_par *par = (struct tga_par *)info->par;
1480 int tga_bus_pci = TGA_BUS_PCI(par->dev);
1481 int tga_bus_tc = TGA_BUS_TC(par->dev);
1482 u8 tga_type = par->tga_type;
1483 const char *tga_type_name = NULL;
1484
1485 switch (tga_type) {
1486 case TGA_TYPE_8PLANE:
1487 if (tga_bus_pci)
1488 tga_type_name = "Digital ZLXp-E1";
1489 if (tga_bus_tc)
1490 tga_type_name = "Digital ZLX-E1";
1491 break;
1492 case TGA_TYPE_24PLANE:
1493 if (tga_bus_pci)
1494 tga_type_name = "Digital ZLXp-E2";
1495 if (tga_bus_tc)
1496 tga_type_name = "Digital ZLX-E2";
1497 break;
1498 case TGA_TYPE_24PLUSZ:
1499 if (tga_bus_pci)
1500 tga_type_name = "Digital ZLXp-E3";
1501 if (tga_bus_tc)
1502 tga_type_name = "Digital ZLX-E3";
1503 break;
1504 default:
1505 tga_type_name = "Unknown";
1506 break;
1507 }
1508
1509 strlcpy(info->fix.id, tga_type_name, sizeof(info->fix.id));
1510
1511 info->fix.type = FB_TYPE_PACKED_PIXELS;
1512 info->fix.type_aux = 0;
1513 info->fix.visual = (tga_type == TGA_TYPE_8PLANE
1514 ? FB_VISUAL_PSEUDOCOLOR
1515 : FB_VISUAL_DIRECTCOLOR);
1516
1517 info->fix.line_length = par->xres * (par->bits_per_pixel >> 3);
1518 info->fix.smem_start = (size_t) par->tga_fb_base;
1519 info->fix.smem_len = info->fix.line_length * par->yres;
1520 info->fix.mmio_start = (size_t) par->tga_regs_base;
1521 info->fix.mmio_len = 512;
1522
1523 info->fix.xpanstep = 0;
1524 info->fix.ypanstep = 0;
1525 info->fix.ywrapstep = 0;
1526
1527 info->fix.accel = FB_ACCEL_DEC_TGA;
1528
1529 /*
1530 * These are needed by fb_set_logo_truepalette(), so we
1531 * set them here for 24-plane cards.
1532 */
1533 if (tga_type != TGA_TYPE_8PLANE) {
1534 info->var.red.length = 8;
1535 info->var.green.length = 8;
1536 info->var.blue.length = 8;
1537 info->var.red.offset = 16;
1538 info->var.green.offset = 8;
1539 info->var.blue.offset = 0;
1540 }
1541 }
1542
1543 static int tgafb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
1544 {
1545 /* We just use this to catch switches out of graphics mode. */
1546 tgafb_set_par(info); /* A bit of overkill for BASE_ADDR reset. */
1547 return 0;
1548 }
1549
1550 static int __devinit
1551 tgafb_register(struct device *dev)
1552 {
1553 static const struct fb_videomode modedb_tc = {
1554 /* 1280x1024 @ 72 Hz, 76.8 kHz hsync */
1555 "1280x1024@72", 0, 1280, 1024, 7645, 224, 28, 33, 3, 160, 3,
1556 FB_SYNC_ON_GREEN, FB_VMODE_NONINTERLACED
1557 };
1558
1559 static unsigned int const fb_offset_presets[4] = {
1560 TGA_8PLANE_FB_OFFSET,
1561 TGA_24PLANE_FB_OFFSET,
1562 0xffffffff,
1563 TGA_24PLUSZ_FB_OFFSET
1564 };
1565
1566 const struct fb_videomode *modedb_tga = NULL;
1567 resource_size_t bar0_start = 0, bar0_len = 0;
1568 const char *mode_option_tga = NULL;
1569 int tga_bus_pci = TGA_BUS_PCI(dev);
1570 int tga_bus_tc = TGA_BUS_TC(dev);
1571 unsigned int modedbsize_tga = 0;
1572 void __iomem *mem_base;
1573 struct fb_info *info;
1574 struct tga_par *par;
1575 u8 tga_type;
1576 int ret = 0;
1577
1578 /* Enable device in PCI config. */
1579 if (tga_bus_pci && pci_enable_device(to_pci_dev(dev))) {
1580 printk(KERN_ERR "tgafb: Cannot enable PCI device\n");
1581 return -ENODEV;
1582 }
1583
1584 /* Allocate the fb and par structures. */
1585 info = framebuffer_alloc(sizeof(struct tga_par), dev);
1586 if (!info) {
1587 printk(KERN_ERR "tgafb: Cannot allocate memory\n");
1588 return -ENOMEM;
1589 }
1590
1591 par = info->par;
1592 dev_set_drvdata(dev, info);
1593
1594 /* Request the mem regions. */
1595 ret = -ENODEV;
1596 if (tga_bus_pci) {
1597 bar0_start = pci_resource_start(to_pci_dev(dev), 0);
1598 bar0_len = pci_resource_len(to_pci_dev(dev), 0);
1599 }
1600 if (tga_bus_tc) {
1601 bar0_start = to_tc_dev(dev)->resource.start;
1602 bar0_len = to_tc_dev(dev)->resource.end - bar0_start + 1;
1603 }
1604 if (!request_mem_region (bar0_start, bar0_len, "tgafb")) {
1605 printk(KERN_ERR "tgafb: cannot reserve FB region\n");
1606 goto err0;
1607 }
1608
1609 /* Map the framebuffer. */
1610 mem_base = ioremap_nocache(bar0_start, bar0_len);
1611 if (!mem_base) {
1612 printk(KERN_ERR "tgafb: Cannot map MMIO\n");
1613 goto err1;
1614 }
1615
1616 /* Grab info about the card. */
1617 tga_type = (readl(mem_base) >> 12) & 0x0f;
1618 par->dev = dev;
1619 par->tga_mem_base = mem_base;
1620 par->tga_fb_base = mem_base + fb_offset_presets[tga_type];
1621 par->tga_regs_base = mem_base + TGA_REGS_OFFSET;
1622 par->tga_type = tga_type;
1623 if (tga_bus_pci)
1624 par->tga_chip_rev = (to_pci_dev(dev))->revision;
1625 if (tga_bus_tc)
1626 par->tga_chip_rev = TGA_READ_REG(par, TGA_START_REG) & 0xff;
1627
1628 /* Setup framebuffer. */
1629 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA |
1630 FBINFO_HWACCEL_IMAGEBLIT | FBINFO_HWACCEL_FILLRECT;
1631 info->fbops = &tgafb_ops;
1632 info->screen_base = par->tga_fb_base;
1633 info->pseudo_palette = par->palette;
1634
1635 /* This should give a reasonable default video mode. */
1636 if (tga_bus_pci) {
1637 mode_option_tga = mode_option_pci;
1638 }
1639 if (tga_bus_tc) {
1640 mode_option_tga = mode_option_tc;
1641 modedb_tga = &modedb_tc;
1642 modedbsize_tga = 1;
1643 }
1644 ret = fb_find_mode(&info->var, info,
1645 mode_option ? mode_option : mode_option_tga,
1646 modedb_tga, modedbsize_tga, NULL,
1647 tga_type == TGA_TYPE_8PLANE ? 8 : 32);
1648 if (ret == 0 || ret == 4) {
1649 printk(KERN_ERR "tgafb: Could not find valid video mode\n");
1650 ret = -EINVAL;
1651 goto err1;
1652 }
1653
1654 if (fb_alloc_cmap(&info->cmap, 256, 0)) {
1655 printk(KERN_ERR "tgafb: Could not allocate color map\n");
1656 ret = -ENOMEM;
1657 goto err1;
1658 }
1659
1660 tgafb_set_par(info);
1661 tgafb_init_fix(info);
1662
1663 if (register_framebuffer(info) < 0) {
1664 printk(KERN_ERR "tgafb: Could not register framebuffer\n");
1665 ret = -EINVAL;
1666 goto err1;
1667 }
1668
1669 if (tga_bus_pci) {
1670 pr_info("tgafb: DC21030 [TGA] detected, rev=0x%02x\n",
1671 par->tga_chip_rev);
1672 pr_info("tgafb: at PCI bus %d, device %d, function %d\n",
1673 to_pci_dev(dev)->bus->number,
1674 PCI_SLOT(to_pci_dev(dev)->devfn),
1675 PCI_FUNC(to_pci_dev(dev)->devfn));
1676 }
1677 if (tga_bus_tc)
1678 pr_info("tgafb: SFB+ detected, rev=0x%02x\n",
1679 par->tga_chip_rev);
1680 pr_info("fb%d: %s frame buffer device at 0x%lx\n",
1681 info->node, info->fix.id, (long)bar0_start);
1682
1683 return 0;
1684
1685 err1:
1686 if (mem_base)
1687 iounmap(mem_base);
1688 release_mem_region(bar0_start, bar0_len);
1689 err0:
1690 framebuffer_release(info);
1691 return ret;
1692 }
1693
1694 static void __devexit
1695 tgafb_unregister(struct device *dev)
1696 {
1697 resource_size_t bar0_start = 0, bar0_len = 0;
1698 int tga_bus_pci = TGA_BUS_PCI(dev);
1699 int tga_bus_tc = TGA_BUS_TC(dev);
1700 struct fb_info *info = NULL;
1701 struct tga_par *par;
1702
1703 info = dev_get_drvdata(dev);
1704 if (!info)
1705 return;
1706
1707 par = info->par;
1708 unregister_framebuffer(info);
1709 fb_dealloc_cmap(&info->cmap);
1710 iounmap(par->tga_mem_base);
1711 if (tga_bus_pci) {
1712 bar0_start = pci_resource_start(to_pci_dev(dev), 0);
1713 bar0_len = pci_resource_len(to_pci_dev(dev), 0);
1714 }
1715 if (tga_bus_tc) {
1716 bar0_start = to_tc_dev(dev)->resource.start;
1717 bar0_len = to_tc_dev(dev)->resource.end - bar0_start + 1;
1718 }
1719 release_mem_region(bar0_start, bar0_len);
1720 framebuffer_release(info);
1721 }
1722
1723 static void __devexit
1724 tgafb_exit(void)
1725 {
1726 tc_unregister_driver(&tgafb_tc_driver);
1727 pci_unregister_driver(&tgafb_pci_driver);
1728 }
1729
1730 #ifndef MODULE
1731 static int __devinit
1732 tgafb_setup(char *arg)
1733 {
1734 char *this_opt;
1735
1736 if (arg && *arg) {
1737 while ((this_opt = strsep(&arg, ","))) {
1738 if (!*this_opt)
1739 continue;
1740 if (!strncmp(this_opt, "mode:", 5))
1741 mode_option = this_opt+5;
1742 else
1743 printk(KERN_ERR
1744 "tgafb: unknown parameter %s\n",
1745 this_opt);
1746 }
1747 }
1748
1749 return 0;
1750 }
1751 #endif /* !MODULE */
1752
1753 static int __devinit
1754 tgafb_init(void)
1755 {
1756 int status;
1757 #ifndef MODULE
1758 char *option = NULL;
1759
1760 if (fb_get_options("tgafb", &option))
1761 return -ENODEV;
1762 tgafb_setup(option);
1763 #endif
1764 status = pci_register_driver(&tgafb_pci_driver);
1765 if (!status)
1766 status = tc_register_driver(&tgafb_tc_driver);
1767 return status;
1768 }
1769
1770 /*
1771 * Modularisation
1772 */
1773
1774 module_init(tgafb_init);
1775 module_exit(tgafb_exit);
1776
1777 MODULE_DESCRIPTION("Framebuffer driver for TGA/SFB+ chipset");
1778 MODULE_LICENSE("GPL");
Support for the Chinese Samsung S3C2440 based development boards